Ubuntu not responding my ARP request
Posted: Fri Dec 23, 2016 7:10 am
My os is running on top of QEMU, which runs on a ubuntu.
I have set up the tap device br0 so that my os and ubuntu are in the same network, sending and receiving raw packets between my os and the ubuntu is no problem.
However, the ubuntu never responds to my ARP packet, even though it certainly sees the ARP packets coming in (because i can see it in tcpdump)
In case I've sent a malformed arp packet(which i m sure it's not since tcpdump can recognize it), i also tried sending arp from the ubuntu machine to itself.
Also no response.
The firewall is also disabled by
What could be the reason of this ? 
I have set up the tap device br0 so that my os and ubuntu are in the same network, sending and receiving raw packets between my os and the ubuntu is no problem.
However, the ubuntu never responds to my ARP packet, even though it certainly sees the ARP packets coming in (because i can see it in tcpdump)
Code: Select all
13:04:42.579969 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has vagrant-ubuntu-trusty-32 tell 10.0.2.14, length 28
0x0000: 0001 0800 0604 0001 5254 0012 3456 0a00 ........RT..4V..
0x0010: 020e 0000 0000 0000 0a00 020f ............
In case I've sent a malformed arp packet(which i m sure it's not since tcpdump can recognize it), i also tried sending arp from the ubuntu machine to itself.
Also no response.
The firewall is also disabled by
Code: Select all
sudo ufw disable